Vehicle driving control method and device of pure electric vehicle

Abstract

The invention provides a vehicle driving control method and device of a pure electric vehicle. The vehicle driving control device comprises a power supply gear connected with a vehicle control unit, an accelerator pedal, a brake and gear detecting circuit, a BMS, an MCU, an ABS and a control circuit. The vehicle control unit obtains the working current, the total voltage, the maximum charging power permitted by a battery management system, the maximum discharge power, the battery electricity, the motor rotating speed, the motor real-time torque, the motor failure state signal, the brake locking prevention signal, the three signals (working state, output current and voltage signals) of a DC converter, the working state, the output current, the voltage signals, the three signals of an air conditioner, a steering pump and a blast pump, the accelerator pedal signal, the brake pedal signal, the gear signal, the downhill auxiliary signal and the power supply gear signal, the actual consumption and required power of a power system are calculated according to the signals, the absolute value of the difference of the actual consumption and the required power is larger than or equal to a preset value, and a zero torque signal is sent to the MCU and / or a cut-off signal is sent to the control circuit when preset time is up, and the pure electric vehicle is high in driving safety.

Description

technical field [0001] The invention relates to the technical field of control, in particular to a vehicle driving control method and device for a pure electric vehicle. Background technique [0002] Transportation energy consumption is one of the main sources of environmental pollution and global greenhouse gas emissions. The standards for vehicle emissions in countries around the world are becoming more and more stringent, making traditional internal combustion engine vehicles unable to meet environmental protection requirements. At the same time, according to the statistics of relevant international organizations, 57% of the world's oil consumption is in the transportation field. According to the current oil extraction rate, there will be no oil to be recovered in 40 years. With the development of emerging economies represented by China, the automobile market will continue to grow in the next 20 years, and my country's dependence on foreign oil has exceeded 50%. Under th...

AI Technical Summary

Problems solved by technology

The vehicle controller, battery management system, and motor controller interact completely through the CAN network, and the degree of electronic control and networking is greatly improved. Controller) programs run away, network signals are interfered, etc., it is easy to cause the power output system to be inconsistent with the driver's torque demand, resulting in abnormally high torque output of the vehicle, and in severe cases, speeding may occur, which poses a great safety hazard

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